Alert archive / Arizona / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 135, NWS Tucson, AZ

August 11, 2021Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 11, 2021, 3:00 PM MST for Cochise County, Arizona. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 11, 2021, 3:00 PM MST (22:00 UTC)
Expired: Aug 11, 2021, 3:31 PM MST
In force: 31 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 115 km from the middle of the area, began a volume at 22:00 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 10.0 hours before the alert went out and 152 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 479 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 823 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

680 
WUUS55 KTWC 112200
SVRTWC
AZC003-112245-
/O.NEW.KTWC.SV.W.0135.210811T2200Z-210811T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
300 PM MST Wed Aug 11 2021

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  South central Cochise County in southeastern Arizona...

* Until 345 PM MST.

* At 300 PM MST, a severe thunderstorm was located near
  Bisbee-Douglas Airport, or near Douglas, moving north at 10 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Douglas, Bisbee-Douglas Airport, Pirtleville and McNeal. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3138 10940 3134 10965 3160 10975 3165 10942
TIME...MOT...LOC 2200Z 166DEG 8KT 3144 10953 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RH

1 follow-up statement

066 
WWUS55 KTWC 112231
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
331 PM MST Wed Aug 11 2021

AZC003-112241-
/O.CAN.KTWC.SV.W.0135.000000T0000Z-210811T2245Z/
Cochise-
331 PM MST Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL COCHISE COUNTY
IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 3138 10940 3134 10965 3160 10975 3165 10942
TIME...MOT...LOC 2228Z 166DEG 8KT 3151 10955 

$$

RH

The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 10, 5:03 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	27 min
Aug 10, 6:15 PM MST	Areal Flood Advisory	TWC	Pima	20 min
Aug 10, 6:19 PM MST	Severe Thunderstorm Warning	TWC	Pima	26 min
Aug 10, 6:32 PM MST	Special Weather Statement	TWC		28 min
Aug 10, 6:35 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 10, 6:41 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	4 hr
Aug 10, 6:49 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 10, 7:07 PM MST	Special Weather Statement	TWC	Pima	38 min
Aug 10, 7:43 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 10, 7:50 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 10, 8:27 PM MST	Special Weather Statement	TWC		33 min
Aug 10, 8:31 PM MST	Special Weather Statement	TWC	Pinal	29 min
Aug 10, 9:41 PM MST	Areal Flood Warning	TWC	Pima	6 hr
Aug 10, 10:06 PM MST	Areal Flood Advisory	TWC	Pima	23 min
Aug 10, 10:29 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	2 hr
Aug 10, 11:35 PM MST	Flash Flood Warning	TWC	Pima	55 min
Aug 11, 12:21 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	4 hr
Aug 11, 12:54 AM MST	Areal Flood Advisory	TWC	Pinal	111 min
Aug 11, 2:04 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 11, 3:24 AM MST	Areal Flood Warning	TWC	Pima	6 hr
Aug 11, 4:13 AM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	4 hr
Aug 11, 4:55 AM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 11, 8:14 AM MST	Areal Flood Warning	TWC	Pima, Pinal	6 hr
Aug 11, 1:41 PM MST	Areal Flood Advisory	TWC	Cochise, Santa Cruz	2 hr
Aug 11, 2:12 PM MST	Areal Flood Advisory	TWC	Santa Cruz	45 min
Aug 11, 2:24 PM MST	Special Weather Statement	TWC	Santa Cruz	21 min
Aug 11, 2:57 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	2 hr
Aug 11, 3:17 PM MST	Areal Flood Advisory	TWC	Cochise	11 min
Aug 11, 3:28 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 11, 3:56 PM MST	Special Weather Statement	TWC		34 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2021 Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.